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Infineon Technologies IFX1117GS V33
- Part No.:
- IFX1117GS V33
- Manufacturer:
- Infineon Technologies
- Package:
- TO-261-4, TO-261AA
- Datasheet:
-
IFX1117GS V33.pdf
- Description:
- IC REG LINEAR 3.3V 1A SOT223-4
- Quantity:
- Payment:
- Shipping:
Inventory:3,037
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Product details
Overview
IFX1117GS V33 from Infineon Technologies is a fixed-output 3.3 V, 1.0 A low-dropout linear voltage regulator in SOT223-4 package, featuring ±2% output accuracy, 1.1–1.4 V dropout at 1.0 A, short-circuit and overtemperature protection, and operation from 4.7 V to 15 V input for industrial power rails.
For engineers reviewing the IFX1117GS V33 datasheet, IFX1117GS V33 pinout, IFX1117GS V33 application, or IFX1117GS V33 equivalent, this page delivers verified electrical specs, thermal resistance (RthJA = 164 K/W unheatsinked), stability requirements (CQ ≥ 10 µF, ESR ≤ 20 Ω), and real-world use cases in embedded microcontroller power supplies.
Technical Context
The IFX1117GS V33 is a monolithic NPN-based LDO regulator with internal reference, error amplifier, and pass transistor. Its fixed 3.3 V output is trimmed during production to ±2% tolerance across 0–125 °C junction temperature.
Protection circuitry includes foldback current limiting (1.1–2.25 A trip range) and thermal shutdown at ~150 °C. Dropout voltage rises predictably with load: 1.10 V at 500 mA, 1.30 V at 1.0 A-enabling stable regulation even under high-current, low-input-margin conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.30 V ±2% (3.23–3.36 V); ensures reliable 3.3 V logic rail compliance for ARM Cortex-M, FPGA I/O, and USB PHYs |
| Max Output Current | 1.0 A continuous; supports single-core MCU + peripheral ICs without external boost stages |
| Dropout Voltage | 1.30 V @ 1.0 A; enables operation from 4.7 V input (e.g., 5 V bus with 0.3 V trace drop) |
| Line Regulation | ≤6 mV (4.7–15 V input); minimizes output drift across wide input transients |
| Load Regulation | ≤10 mV (0–800 mA); maintains tight voltage under dynamic CPU load switching |
| PSRR | 65 dB @ 120 Hz; suppresses ripple from noisy switcher pre-regulators |
| RMS Noise | 30 ppm of VQ (≈100 µVrms); suitable for analog sensor front-ends and ADC references |
Pinout & Package
Package: P-SOT223-4 (4-pin surface-mount, exposed pad for thermal conduction). Pin 4 is internally connected to Pin 2 (output) and serves as heatsink terminal-must be soldered to ≥300 mm² copper area for RthJA = 81 K/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Ground reference for internal bandgap and error amp; must connect to low-impedance PCB ground plane |
| 2 | Q (Output) | Regulated 3.3 V output; requires ≥10 µF ceramic or tantalum capacitor (ESR ≤ 20 Ω) for stability |
| 3 | I (Input) | Unregulated DC input (4.7–15 V); needs local 100 nF bypass capacitor per datasheet Figure 5 |
| 4 | Q (Heatsink) | Electrically tied to Pin 2; provides thermal path to PCB copper-no separate signal function |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.3 V output | Eliminates external resistor divider, reducing BOM count and layout sensitivity vs. adjustable variants |
| Thermal shutdown | Activates at ~150 °C junction temperature, preventing catastrophic failure during sustained overload |
| Short-circuit protection | Current foldback limits peak fault current to ≤1.1 A, enabling safe recovery after transient shorts |
| Low ESR capacitor support | Stable with 10 µF/≤20 Ω output caps-compatible with low-profile X5R ceramics instead of bulkier tantalums |
| Industrial temp range | Guaranteed operation from 0 °C to 125 °C junction, supporting fanless enclosures and automotive under-hood proximity |
Applications
| Microcontroller Power Supply | FPGA I/O Bank Regulator |
|---|---|
Use Scenario: Powers ARM Cortex-M4 core and peripherals from a 5 V intermediate rail in industrial PLC modules. IC Role / Device Role / Timing Role: Primary 3.3 V LDO delivering clean, low-noise supply to digital logic and internal ADC reference. Use Value: 1.3 V dropout allows full 1.0 A delivery even with 0.3 V PCB trace drop, avoiding brownouts during burst processing. | Use Scenario: Supplies configurable 3.3 V I/O banks on Xilinx Spartan-7 FPGA in test equipment. IC Role / Device Role / Timing Role: Local point-of-load regulator ensuring stable I/O voltage despite fast-switching current demands. Use Value: 65 dB PSRR attenuates 120 Hz ripple from upstream AC/DC converter, preserving signal integrity on high-speed LVCMOS interfaces. |
| USB Peripheral Power | Automotive Body Control Module |
Use Scenario: Provides regulated 3.3 V to USB 2.0 transceiver and EEPROM in embedded host controller. IC Role / Device Role / Timing Role: Isolated power domain decoupling USB PHY from noisy system rails. Use Value: 30 ppm RMS noise (≈100 µV) meets USB spec requirements for jitter-sensitive data recovery circuits. | Use Scenario: Powers CAN transceiver and microcontroller in vehicle door module operating at ambient 85 °C. IC Role / Device Role / Timing Role: High-reliability LDO meeting AEC-Q100 stress requirements for under-dash electronics. Use Value: Guaranteed 0–125 °C operation and thermal shutdown enable continuous duty cycle without derating in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fixed-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV1117-33CDCR | Lower max current (800 mA), higher dropout (1.2 V @ 800 mA), no heatsink pin (SOT-223-3) | Limited to sub-1 A loads; less thermal margin in compact layouts | Select if cost-sensitive and load < 800 mA; verify thermal rise with 164 K/W RthJA |
| NCP1117ST33T3G | Same 1.0 A rating but ±2% tolerance only at 25 °C; wider temp drift (±4% over –40–125 °C) | Requires tighter input margin or post-regulation filtering for wide-temp designs | Select for legacy compatibility; avoid where full-temp accuracy is critical (e.g., precision ADC refs) |
Compared with TLV1117-33CDCR and NCP1117ST33T3G, the IFX1117GS V33 offers superior thermal management via Pin 4 heatsink connection and guaranteed ±2% accuracy across full industrial temperature range-critical for high-reliability embedded systems.
Availability
IFX1117GS V33 is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, and embedded computing platforms requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for IFX1117GS V33 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive ICs, and industrial control solutions, with global manufacturing and quality certification to ISO/TS 16949 and IATF 16949.
The IFX1117 product line delivers robust, thermally optimized LDO regulators for safety-critical and high-ambient-temperature applications-including engine control units, industrial HMIs, and railway signaling systems.
FAQ
What is the minimum input voltage required for full 1.0 A output at 3.3 V?
The IFX1117GS V33 requires a minimum input voltage of 4.7 V to sustain 1.0 A output current while maintaining regulation. This accounts for its 1.3–1.4 V dropout at full load, as specified in Table 6 of the 2004 datasheet Rev. 1.1. Below 4.7 V, output voltage drops below 3.23 V (–2% tolerance limit).
Can Pin 4 (Heatsink) be left floating or used as a separate ground connection?
No-Pin 4 is electrically bonded to Pin 2 (output) inside the die and serves solely as a thermal conduction path. It must be soldered to a large copper pour (≥300 mm² recommended) and cannot be used as a signal or ground terminal. Floating Pin 4 degrades thermal performance and risks thermal shutdown under load.
Is an input capacitor mandatory, and what value is recommended?
Yes-an input bypass capacitor is mandatory for stability and transient response. The datasheet specifies a 100 nF ceramic capacitor placed as close as possible to Pins 3 (I) and 1 (GND). Larger values (e.g., 1–10 µF) may be added in parallel for improved low-frequency ripple rejection, but 100 nF is the minimum required for proper operation.
Does the IFX1117GS V33 support reverse polarity protection or input overvoltage clamping?
No-the IFX1117GS V33 has no built-in reverse-polarity or overvoltage protection. Absolute maximum input voltage is 20 V (Table 3), and reverse input voltage down to –0.3 V is tolerated. External protection-such as series Schottky diode for reverse polarity or TVS diode for surge-is required in harsh environments per application requirements.
IFX1117GS V33 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- TO-261-4, TO-261AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 15V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1.4V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- -
- PSRR:
- 65dB (120Hz)
- Control Features:
- -
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- 0°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-SOT223-4-21
IFX1117GS V33 FAQ
1.How can I place an order for IFX1117GS V33 through Aetrix?
Please submit a Request for Quotation (RFQ) for IFX1117GS V33 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for IFX1117GS V33 reliable?
The price and inventory of IFX1117GS V33 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IFX1117GS V33 is usually 5 days.
3.What payment methods are accepted for IFX1117GS V33?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IFX1117GS V33 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IFX1117GS V33?
IFX1117GS V33 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IFX1117GS V33 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for IFX1117GS V33?
For technical support, including IFX1117GS V33 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IFX1117GS V33 requirements.
6.How does Aetrix verify that IFX1117GS V33 is sourced from the original manufacturer or authorized distributors?
All IFX1117GS V33 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that IFX1117GS V33 meets industry standards.
7.What is the process for return or replacement of IFX1117GS V33?
All IFX1117GS V33 units undergo pre-shipment inspection (PSI). If there is an issue with IFX1117GS V33, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The IFX1117GS V33 part is unused and in its original packaging.
Return procedure for IFX1117GS V33:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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